| 1. | First occurrence of acanthodian microfossils from the early devonian of lijiang , yunnan , china
泥盆世棘鱼类微体化石的首次报道 |
| 2. | The hard coats of spores and pollen grains are preserved better , forming microfossils
孢子和花粉粒的坚硬外壳被完好保留下来形成微化石。 |
| 3. | Our oldest fossils date to roughly 3 . 5 billion years ago , and consist of bacteria microfossils
我们的最旧的化石约会对大致3 . 5十亿年前,和包括细菌microfossils 。 |
| 4. | In the summer of 2003 we began to zero in on one microfossil type whose complex morphological characteristics particularly intrigued us
2003年夏天，我们开始瞄准一种微化石的类型，其复杂的形态特徵特别引起我们兴趣。 |
| 5. | Our initial probes suggested that a relatively thin sedimentary layer , which is black in color , would be the most promising for finding a variety of microfossils
我们的初步探查显示，有一层黑而薄的沉积，最有希望找到各式各样的微化石。 |
| 6. | We know from microfossil evidence that living cells existed on earth some 3 . 5 billion years ago , and these bear a striking resemblance to microorganisms we find today in geothermal springs
从微体化石的证据显示，细胞早于约3 . 5亿年前便已存在，它们竟和现时在温泉中发现的微生物十分类似。 |
| 7. | Well - preserved autofluorescence properties show a correlation between acritarchs morphology and the intensity of organic cell walls and two groups of microfossils are distinguished
这也是我国首次用化石藻类荧光与生物属性关系进行研究的尝试，为今后利用荧光进行化石藻类分选和超微结构研究作了有益的探索。 |
| 8. | The latest studies show that these rocks are older than the ediacara biota , most likely 580 million to 600 million years old , and thus that the microfossils they contain lived 40 million to 55 million years before the cambrian
最新研究显示，此沉积比艾迪卡拉生物群还早，很有可能介于6亿到5亿8000万年前，也就是说，里面微化石的生存年代比寒武纪还早了4000万到5500万年左右。 |
| 9. | The origin and evolution of land plants was an important event in the history of earth life and has affected all other lives on the earth and global environment . during the past two decade , the new discoveries of fossil plants microfossils and megafossils from the mid - ordovician through all silurian to the lower devonian improved knowledge of the origin of land plants , provided a time framework of the basal groups for the land plants and the early evolution diversity of vascular plants . three new plant based epochs have been recognized . on the other hand , molecular sequence studies have provided insights into the phylogeny and early branches of land plants . a phylogenetic tree has been established by the joint of a study of comparative morphology and gene sequences . this paper summarizes recent advances and new knowledges , comments on the phylogenetic studies based on the cladistic analysis
陆生植物的起源和演化是地球生命中的重大事件，它影响到地球上所有的其他生命和全球环境。在过去的20年中，从中奥陶世历经整个志留纪至早泥盆世的岩层中，化石植物微化石和大化石的新发现改变了人们对陆生植物起源的认识，并且为陆生植物和维管植物早期演化分异提供了基部类群分化的时间框架。据此人们识别出地史中的3个陆生植物的时代：始胚植物时代始维管植物时代和真维管植物时代。 |
